A valve you cannot find is a valve you cannot close. Most Brandon homeowners learn where theirs are while water is already running, which is the worst time to learn. Ten minutes on a calm weekend gives you a plan for a burst supply line, a long trip or an approaching storm.
Three Kinds of Shutoff, and Where to Look
| Valve | Rule or role | Where to start looking |
|---|---|---|
| Main shutoff | Every dwelling needs an accessible main near where the water service enters (P2903.9.1) | Often near the front hose bib, on a garage wall or in a utility closet |
| Heater shutoff | Isolates the tank from the house supply | On the cold pipe at the top of the tank |
| Fixture stops | Required on each fixture except tubs and showers (P2903.9.3) | Under sinks, behind toilets, behind the washing machine |
The valve at the county’s meter is the utility’s. The house-side main is yours, and a leak at or before the meter is the county’s to deal with, while a leak after it is yours. Tag the valves you find and photograph them for anyone who house-sits.
Test Them Today
- Close the main and open the lowest faucet to confirm flow stops. Reopen slowly and look for drips at the stem.
- Give each fixture stop a quarter turn and back, gently. A stop that will not move, or weeps when it does, should be replaced rather than forced.
- Shut the heater cold inlet only after cutting power. Electric heaters get the breaker off first.
Replacing a failed angle stop or supply line is a standard repair, typically $125–$350. If a stainless braided supply line has rubber inside, the county notes that degraded lines are a common source of particles in tap water, so replace them while the stop is off. See plumbing repairs for the full list.
Map and Label Them
Take a photo of each valve with something in the frame that shows where it is, such as a wall corner, the water heater or a window. Save the photos in a shared album with the household. Tie a paper tag to the main with the direction to close it, because valves vary: a quarter-turn lever closes with the handle across the pipe, while an older gate valve wants a wheel turned clockwise until it stops. A valve that has not moved in years may be seized, and forcing it can break the stem, which is exactly the failure you are trying to avoid.
Before You Leave Town
Close the main. A supply-line failure can run for days while no one is home, and the main is the one valve that stops every line. Turn the water heater down or off, dropping electric heaters at the breaker first. Close the washing machine valves and the ice maker line. Ask a neighbor to look in, and leave the main’s location with them.
After the Storm: A Ten-Minute Walkthrough
- When service is back, read the meter with all fixtures off and check it again in an hour. A moving needle after a pressure drop can mean a pipe was disturbed.
- Look under every sink and behind the toilets for drips at the stops and supply lines.
- Check the heater pan and the garage floor around it.
- Listen for running water in the walls when the house is quiet.
- Walk the yard and look for wet ground near the meter.
What Milton Showed Hillsborough
In October 2024, after Hurricane Milton, the county issued a precautionary boil-water notice for about 4,000 connections in Seffner and north Brandon starting October 10, after main breaks dropped pressure. It was lifted October 12 after testing. Meanwhile about 700 of the county’s nearly 900 lift stations lost power, and flooded sewer systems backed up into some homes. The plumbing prep that follows is short: know the main, know the heater shutoff and do not drink tap water under a notice. The county points to HCFL Alert for large-scale notices.
- Water main break, or sewage backing up from a damaged pipe: call Hillsborough County Water Resources at (813) 307-1000. The county says not to use its online form for these.
- Low pressure or a home water outage: use the county’s online request form and choose “Other.”
- If water reaches an electric heater or a panel, stay clear and call a licensed electrician.
Our emergency checklist turns this into a one-page sequence. After-hours dispatch runs $150–$250 and most emergency repairs land between $250 and $900, through emergency plumbing repairs. The north side of Brandon, including Seffner, is where that October 2024 notice applied.
Valve will not turn or will not seal?
A stuck or weeping shutoff is a short repair when nothing is flooding. Call to schedule it before the next storm.
CALL 813-733-7188Shut-off valve questions
The code says it must be accessible and near where the water service enters the house. Check the front hose bib area, a garage wall or a utility closet. The valve at the county’s meter is the utility’s, not the homeowner’s.
Closing the main is the simplest protection, because a failed supply line or washer hose can run for days in an empty house. Turn the heater down or off first, cutting electric heaters at the breaker, and shut the washing machine valves.
The county says to call Hillsborough County Water Resources at (813) 307-1000 and not to use its online request form for these. For low pressure or an outage at your home, use the online form and choose “Other.”
Follow the county notice and do not drink tap water until it is lifted. Know your main and heater shutoffs, and check HCFL Alert for large-scale notices. If you suspect a plumbing leak after the pressure drop, close the main and call us.